Fluid pressure brake



Aug. 27, 1935. c. c. FARMER ET AL FLUID PRESSURE BRAKE Filed July '7,' 1932 Mmm nimm I ih wwf..

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Patented Aug. :27, 1935Y This`v inventionV .relates-,to :Huid pressure brake equipmentcgandparticularly tothe branch pipe T, and appurtenances connected-:inthe branch Pipe between the brakeifpipe and the .brakeconlQllingiValVedevcel; E5: 5:1V #..Heifetofore4 it has beenlthe practice. to mount the;v triple or brake controlling valvel device upon a vehicle Aat a point .remote .from -thetbrakeg pipe andeto connect it to the branch pipe .T on the brake .pipe bygmeans of .a branchpipeincluding aldirtcollectorand a separate cuteoutxvalve .de- Y-ce .and connectedY pipe section lThe branch'pas'- sagefrthusvconstituted, Vcontained aynumberv of rthi*.eaiieclipipe sectionsjandi ttingswhich add to the length of the"` branchpas'sage-15lt been found'lthat relatively rglon'gandiftortuous'. branch passages., retard.. the-fowz/of fluid and thus ...the operation of the brakeequipment and materially interfere with 1 the; .desired rapid. operation fof the quick action devices foreffe'cting serial .qiiicki apillation 'ofV the brakes'jthroughout thetrai'n. Objectief the invention' is to .provide arbra'nch pipehavfing thepipe.'T;.cut-'oiit valve device and dirt :nollectorliso associated that 1 they constitute a, compact :assembledA uniti having-a ,relatively short and direct passage for fluidY and` :wherein .the .number of pip'econnections l and eiittings are reduced; by; providing a collector that may. be directly;.poonhected .to fthe brake-.controlling .valve 'device'and a. combinedxbranch'pipe 'Land cut p out valve Which also `ccnstitutesla 'support for `the brakepipe.f.y

L ,..Arurmerobj'ect of thivimon is to provi-de. a branch'pipe unit having the yabove noted'char.- Y acteristics. wherein' theV dirt. :collector` andfib'ranch pipe;v T maybe assembled A and 4handled as .'agunit andgapplied between'v parallel. .plane faces .off; the

`vbrake controlling valve deviceanda parton the .vehicleby movement in the' directionof the planes' of, saic'iV faces, `thereby enabling. removal and replacement-oi the .branch` pipe unit-without ne'- vcessitatine' bodily movement ofthe.. brake con# trolling valve device."

n further object of themvenuo .to provide "a .cutg-outvalve device inthe branch pipe'between the brake pipe and the brake controlling valve idevicethat-,will insure one brake'applioation in V-theleventthat the cutout..'valve is. unintentionh ;ally allowed .to remain closed and .Withthe brake controllingvalve charged,... l'The brakes associated with; the brake controlling valve `device .having .thexcloseig cut-out valve `Will fnot. release when ibrakevalve turned to release positi'oriyfand .this fact ywill direct attention tothe .closed icut- -outvalveanp- 1. f

Qpipeal'. and cut-out val-vej device I'l.Y f f These and` other objects of the invention that will be made apparent.throughoutV the further dez-,i scription .thereof are attaine'dby means'. of .the apparatus hereinafter .described and: illustrated inthe accompanying drawing,-Wherein: Y. :l Fig'. 1 is' an'elevationaLview 'of a fluid Vbrake equipment embodying featuresof the invention;

Fig.. 2is a sectional view of a'portion of the apparatus shov'vn in Fig.71, showing the branch pas-'1 `sage assembly; 1 Y n 5 Fig-.5.3 is 'a sectional vieW'partially in elevation of azpipe T 'constituting a part of 4thefbranc'zli passage assembly,` the section being' taken" on Vthe line .3-3 ofFig.'2;. 1

Fig. 4 is'asectional View of a modifedlfformof pipe T 'and cut-out valve devicef and] i n Figs. 5 and 6 are fragm'en'talA sectional vievvs of the cut-out valvenshown Fig. 4,. these'ctions v the. cutout valve in closed fandl open positions respectively.U..Y f f i' lvlefrerririg `to `the drawing, theimproved.l branch .passage unit is'shown as applied. to a of brake controlling valve devicerand associated-ap*- pa'ratusrwhich comprises a' valve device ill-havin'g a `pipe bracketcasting;I2,.`upon nf'sideof 'wm-ch azfsem'ce 'applicanon4 valvevdevic relis attached and Aimoiiie other side'ofA win lian .'e'merge'ncy'app-lication valve-v d'evnie` is'also fat-- tackled, aniauxiliary reservoir M; a brake'cylin? .derA Iii, a dirt collector 16, and-a'cor'nbinedbranch Referrer-agro Fig.. a; the combined branch pie .T and .clit-out valve device-V l'l` comprises a .ing .i 8 "having a,` boreV i 9 eitendingl therethrough -ior receiving 'the' aligned threaded' ends lfilth being taken o'n'the line 5-5 of Fig. 4 and'showing 'brake pipe.V Sections 2 L: 'A chamber 22 Visprcvvided Y @in 'me casing between me ends of me bore i9 and 'whicheXt-ends 'inertica1`lir communicatesvvith .apnssagef in the casi-ng ll-L-F-luidunder presi .to flow upwardly through the chamber fnin nuidnowsdfmm the brake pipe to the brake con'- :tr-ouiilg vize device n. 'inem' is, therefere,iess tende'ncy; Ion-'dirtand foreignparticles in 1 the brakeppip'e towiiow...up wardiy into thebranch Afvaiveciralmberfru"extends-from one side 'of the' casing f I8 "to .the other i and is" taperedvfor nmerlwpass tothe'passa'ge 23 kcammini which 1 receiving a tapered plug valve` 25 having a portv 2s .exndingtherrethroagh ana-the valve maybe adjusted to register, when in open 'positioawith ath'e passage 23;:for permittingtne new ofrfl'uid Auriner :pressure from 'fthe :make .pipe Ato niinrit- 2, i collector I6. The port 26 is :so'arranged that when the plug valve 24 is turned through 90degrees the port 26 is out of registry With the passage 23 and the plug valve closes said passage. The tapered plugV valve is provided with a stem 21 which extends exteriorly ofV the casingIS and a 'handleN 28 Yis securedto the sternv so that the valve may be manually moved to open and closed l position.V 'I'he'valveplug is yieldingly maintained in operative position in the tapered chambera24. by a spring 29interposed between the inner end of the plug valve anda vnut 3| threaded into the casing.

The pipe T casing isprovidredA with an" integral bracket 32 having a at face 373 for engaging the 'web of an I-bearn whichY constitutes a part. o ff the vehicle frame. The bracket is secured Yto the frame part by means of aboltf35.

The centrifugal dirt collector I6 is of the Iusual standard type except'that it isprovided with aV flat attachingl fac'e 36 which is adapted'to be se- -cured` to anextension 31 of thepipe `bracket -I2 with a packing gasket..38 interposedbetween the attaching face 39..of the extension31 and the at face 36 of theldirt collectorV I6.; The dirtY collector is attached .to'the pipe. bracket extension bymeans of bolts `not shown.

The-dirt. oollectorlli and the pipe T casing I8 v areconnected by fa threaded pipe nipple 4I and when thus joined constitutes `a branchpassage .unit or assemblyy which .may be handled or shippedas a unitandassembled on a .vehclefbe-l .tween the'plane' faces of thepipe .bracket extenV i sion 31 and the I-,beam 34 by movementV laterally intov operative position as shown gin; Fig. 2.

Fluid under pressure ows from the brake pipe 12| .through chamber 22',passage,23, port 26in 'thegplug valve 25,. pipe nipple 4I-` and into the truste-conical dirt collector chamber 42. through passage43 in the dirtcollector casing I6. Fluid flows from the chamber 42'through` passage 44 topassage 45 leading to the piston chambers, not

shown, of VVthe service and emergency application valve devices.

From the foregoing, it ple branch passage unit is provided' which af.-

,fordsg ashort and direct passage .for fluid under pressure flowing from the brake pipeto the brake opening 48l through which afvalveffstem` 49 ex 4 tendsexteriorly of the casing I8. The-stem 49.is

providedl with an operating handle'5lby means `of whchlrthestemis rotated. ,The inner end "ofu the stem 43. is-'supportedin a bearing recess, 52

in the casing I8 and a spring 53, interposed between the end ofthebearingfrecess 52 and the inner end of the stemf49, serves to press the stem .outwardly so that the flange 54 on Vthe stem engages a packngfwasher 551supported in a. recess 56 in thenut 41, for preventing leakage of uid pastthe flange and through thefopening` 48.7in j the nut. Communicationisestablished between the valve chamber '.46 yand the pipe. T chamber 22 through a passage l23 and the casing I8, is provided with a passage 51. which opens into the .chamber lIIv and-which is adapted to be closed lby a segment valve 58 vthat is adapted to be 0pjerated by thesfvalve stem,.49 when the latter is rotated. The. segment valve. 58..'is .providedfwith is apparentfthat sini;

branch pipe VT having a*V .pressure is reducedbelow that a recess 59 for receiving a lug 6I which extends radially from'the valve stem 49 and which serves to move the segment valve 58.

The segment valve is'yieldingly pressed into engagement with the cylindrical seat formed by the cylindrical wall of the chamber 46 by a spring .62 that'is interposed between the ,sternV 49 and the segment. v'alvef58 as indicated in Figs. 5 and 6, which sho'w respectively the 'closed and open position of the valve.

" This form of segment valve is disclosed in the `copending application yfor patent, Serial No.

621,197, filed July V7., 1932, by Carlton D. Stewart, and assigned'to'theassignee of this application, and no claim'is made for the specic valve construction; herein' disclosed. However, this form Y ofjvalrve"is"particularly well adapted for use as a cut-out'yalve'ina branch passage of a train brake system'for the reason that the valve is `yielding'ly pressed against itsseat and may, when the brake pipe pressure is reduceda predetermined degree below the pressure in passage 51',

permit. the passage of fluidi under pressure from the passage 51 tothe valve chamberV 46 for ef-A Vfecting an application of the Vbrakes when the valve is in closed position. By 'reason of this feature;y inthe event that-the cut-out valve vis unintentionally allowed tol remain in closed posi#` tion, Aa reductionin brake pipepressure for effecting an application of the brakes of the train will soA reduce the pressure inthe-'chamber 46 that the higher pressure inthe passage 51 which is connected tothe brake controlling valve devicejassuming the brake controlling valve device to ble-charged, will V'overcomethe tension of the spring 62 andpermit thebrake'controlling valve device ,to function once" even vthough Athe cut-out valve isl closed. The segment'va1ve58will, 'however, prevent subsequent charging of -the?brake controlling valve. deviceand release ofgthe asso# ciatedbrakes,V andit'wll benecessary for the trainman r.to manually move '.theseg'ment valve .to open position shown in Fig,Y 6 in order to release the brakes and obtainsubsequent-operation of the brakes controlled by theV brake controlling valve-device; l 1 v lWhile but' two embodiments of `the invention are disclosed, it is obvious that changes, komissions and additionsniay be made tothe .branch pas- -sage Y.construction disclosed without departing fromth'e spirit of the invention. A l' Y Having now described our invention, what we claim as new and'rdesire to secure by Letters Patent, f v i v j 1; The combination with a brake pipe',a brake Ycontrolling valvedevice operative upon a reduction in'uid pressure for eifectingv an application fof thebrakes; and a'branch pipe `establishing communication from the brake pipe'to said valve device, of. a manually operable cut-out'valve device for closing: said communication and operable `by:ijluidfunderpressure acting on the brake conv` trolling valve side of said cut-'outfvalve device to :ssA

open said communicationwhen the brake pipe acting on said vvalve device. Y

2.1'7Ihe combination ^with. a brake controlling valve device, a brake pipe for supplying-fluid :under pressurelto Ysaid valve device and a branch .connection establishing communication 'from said brake pipeV to said valve device; of a manually operable valveY device forclosing' said comfmunication and operable'in the closed position by'iluid under pressure acting. on the brake con- Y.

trolling valve device side of said manually' opereisV 2,012,743 Y A n trolling valve device, and al manually operable Y able valve device when the iiuid pressure in said brake pipe is reduced a predetermined degree below that acting on said controlling valve device,

` for venting uid under pressure from'said brake controlling valve device to effect an application of the brakes. f y

3. A branch pipe Ticomprising a casing hav# ing a bore for receiving the threaded ends 0f brake pipe sections and having a valve chamber communicating with said bore through a branch passage adapted to be connected to a brake convalve in said chamber for controllingsaid branch passage, said valve being yieldingly held upon its 

